I can't speak to growing or shrinking in terms of number of users and I try not to bring "feels like" into this since that's subjective. However, anecdotally speaking, I've been noticing signs of a down turn over the past month or two. Perhaps just a seasonal thing, perhaps due to some other cause such as the upgrade to 0.19.X.

The most telling thing to me is that I'm seeing fewer comments during my active hours. One of the ways I browse for active discussions on Lemmy is to sort by "New Comments' and switch to the view that shows comments instead of posts. So, I do the sort/filter, view the results, looking to see if there are any interesting comments or topics.

Historically speaking, other than a weird bug that would seem to pin some slightly older posts to the top of the list, everything on the first page would be somewhere between seconds to several minutes old. It was incredibly unusual to see anything over 5 minutes old on the first page and also very unusual to see any of the same comments if I refreshed the page.

More recently though, it's more common to see comments that are 5+ minutes old on the first page of new comments list. It's also much more common for me to reach the bottom of the page, hit refresh, and then see some of the same comments in the list after it refreshes. And I don't exactly speed run through this page -- I check out the post titles, if it's an interesting topic, I'll often click through and read more in the post, sometimes I'll even respond to comments directly, then return back to the new comments, etc.

As I mentioned, it could just be a seasonal slowdown. Perhaps the 0.19 upgrade results in a slowdown or backlog of things that show up on the new comments list, I know other things have changed like the fact that I can no longer view anything except the first page of results. Others have suggested there are fewer posts/posters, but that what gets posted "feels like" it's higher quality, but I'd counter that with the fact that what I "feel like" is that's not actually the case based on what I'm seeing in the new comments list.